Volume 97A, Number 11, November 2020 Cover Image

Abstract Tumor infiltrating macrophage are acting on the tumor and the tumor microenvironment in either fighting or supporting tumor development. These modes of action are orchestrated by different signaling molecules as purines and purinergic receptors as excellently review by Arnaud‐Sampaio and colleagues and induce two different flavors of macrophages of the M1 or the M2 type (read more here: 1109‐1126)